Accidentally dropped your car key fob in water? Whether it’s been soaked in the rain, gone through the washing machine, or dropped in a puddle, water damage can stop your key fob from working, leaving you locked out of your vehicle.
Modern car key fobs contain sensitive electronics, and exposure to moisture can cause corrosion, short circuits, or total failure. But quick action can make all the difference.
In this article, we’ll show you exactly what to do when your key fob gets wet, how to dry it safely, how to test if it still works, and when to call a locksmith. You’ll also learn tips to protect your key fob from future water damage, and how UK Auto Locksmith can help with fast, affordable key repairs and replacements across the UK.
Why Water and Car Key Fobs Don’t Mix
Car key fobs may seem durable, but inside, they house delicate electronic components like a circuit board, battery, and transponder chip. These parts are essential for locking, unlocking, and starting your car remotely. When exposed to water, even a small amount of moisture can cause short circuits, corrosion, and permanent failure.
If water enters the fob, it can disrupt the communication between your key and vehicle, leaving you unable to unlock or start the car. The damage might not show immediately, but over time, moisture can silently destroy the internal systems.
That’s why it’s critical to act fast. The quicker you dry and inspect the fob, the better your chances of saving it and avoiding the need for an expensive replacement.
The Importance of Quick Action
Water damage can be devastating, but acting quickly can prevent it from becoming permanent. The longer your key fob remains wet, the higher the chances of internal corrosion and irreversible damage. That’s why it’s essential to follow the right steps immediately after your key fob has been exposed to water.
By taking immediate action, you may be able to save your fob from complete failure and avoid expensive replacement costs.
At UK Auto Locksmith, we understand how crucial your key fob is for the functionality and security of your vehicle. Whether you’ve dropped it in a puddle, accidentally washed it, or had it exposed to rain, we’re here to provide expert solutions. If your key fob is beyond repair, don’t worry—we offer fast, reliable replacement and reprogramming services.
✅ No call-out charge ✅ 30min response time ✅ Up to 12 months warranty ✅ 2nd key up to 50% off
Immediate Steps to Take After Your Car Key Fob Gets Wet
If your car key fob gets wet, time is of the essence. Acting quickly can make the difference between a fully functional fob and an expensive replacement. Here’s what you should do straight away:
1. Remove the Battery Immediately
Open the fob (if possible) and take the battery out. This stops any electrical current from flowing through damp circuits and helps prevent short circuits or permanent damage.
2. Dry the Exterior Gently
Use a soft, dry cloth to blot away visible moisture. Don’t press too hard or shake the fob; both can force water deeper inside.
3. Use Silica Gel or Rice to Absorb Moisture
Place the fob in a sealed container filled with silica gel packets (the ones found in shoeboxes), or if unavailable, uncooked rice. Leave it there for at least 24-48 hours to draw out any remaining moisture.
4. Avoid Heat at All Costs
Don’t use a hairdryer, microwave, or radiator to speed up the drying process. Excess heat can warp or damage internal parts. Let the fob dry naturally at room temperature.
What to Do If Your Car Key Fob Still Isn’t Working
After you’ve dried your key fob thoroughly, it’s time to check whether it’s still functional. In some cases, even after careful drying, the fob may not work correctly.
Here’s what to do next:
5. Inspect for Visible Damage
Look for any signs of corrosion, cracks, or loose parts. A greenish residue or rust around the battery contacts often indicates internal water damage. Cracks in the casing may also mean moisture has gotten too deep.
6. Reinsert or Replace the Battery
Put the original battery back in, or better yet, try a fresh one. Sometimes the issue is as simple as a drained battery that got damaged in the drying process.
7. Test All Functions
Try locking and unlocking your car. Also, check if the key fob still starts the engine, activates the alarm, or controls any additional features it had before. If even one function fails, there might still be moisture or internal damage.
When to Call a Professional for Help
If your car key fob still isn’t working after drying and battery replacement, it may be time to seek expert assistance. Water can cause invisible damage to the internal circuitry that only a professional can properly diagnose.
Why Choose UK Auto Locksmith?
At UK Auto Locksmith, we specialise in fast, affordable key fob repairs and replacements. Our mobile technicians can often come to you the same day, whether you’re stuck at home, at work, or on the road.
✅ 30-minute response time ✅ Up to 12 months warranty on new fobs ✅ 2nd key at up to 50% off ✅ All major car makes and models covered
Don’t let a water-damaged key fob leave you stranded. Our team will assess the condition of your fob and provide an honest recommendation, whether it needs reprogramming, repair, or full replacement.
Call now or leave your message below for a quick quote —>
Yes, there’s a chance your key fob will still work after getting wet, especially if you act quickly and follow the drying steps properly. If the internal components have not been damaged by the water, drying the fob out completely may restore its functionality.
We recommend letting your key fob dry for at least 24-48 hours using rice or silica gel to absorb moisture. The more thoroughly the fob dries, the better the chances it will function properly again.
Do not use excessive heat, such as a hairdryer or radiator, as it can damage the internal components. Additionally, avoid trying to reassemble the fob before it is completely dry to prevent further damage.
You can attempt to clean and dry the fob using the steps we’ve outlined, but if the fob still doesn't work after drying, it's best to consult a professional locksmith. They can diagnose the issue and offer a solution, whether it’s repairing or replacing the key fob.
If your key fob isn’t working after it got wet, the water may have caused internal corrosion or a short circuit, even if it appeared to be dry. In such cases, a replacement or professional repair might be necessary to restore functionality.
If your key fob still isn’t working after drying, it's time to contact UK Auto Locksmith for assistance. Our team can help assess the damage and offer solutions such as key fob repair, reprogramming, or replacement to get you back on the road.
02038809904
Mon - Sun 24 Hours
Available Monday – Sunday 24 Hours
Only Experienced and Reliable Auto Locksmiths
Everywhere in London